Lens driving apparatus

Patent metadata

Field	Value
Publication number	US-10830985-B2
Application number	US-201515537817-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 19, 2014
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

One embodiment of a lens driving apparatus may comprise: a bobbin having a first coil disposed on the outer circumferential surface thereof; a position detection sensor which is disposed on the outer circumferential surface of the bobbin and which moves together with the bobbin; a first magnet disposed opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members which are coupled to the bobbin and the housing; and a plurality of wirings which are disposed on the outer circumferential surface of the bobbin so as to electrically connect at least one of the upper or lower elastic members with the position detection sensor.

First claim

The invention claimed is:

1. A lens moving apparatus comprising:
a bobbin having a first coil disposed on an outer circumferential surface thereof;
a position sensor disposed on the outer circumferential surface of the bobbin, the position sensor being configured to move together with the bobbin;
a first magnet disposed so as to be opposite the first coil;
a housing configured to support the first magnet;
upper and lower elastic members coupled to the bobbin and the housing; and
a plurality of wires disposed on the outer circumferential surface of the bobbin for connecting at least one of the upper and lower elastic members to the position sensor,
wherein the bobbin has a receiving recess in which the position sensor is disposed, the receiving recess comprising a bottom and a sidewall.

2. The lens moving apparatus according to claim 1 , comprising:
pads disposed on at least one of a bottom and a sidewall of the receiving recess so as to be connected to the position sensor, wherein
one end of each of the wires is connected to a corresponding one of the pads.

3. The lens moving apparatus according to claim 1 , wherein
the bobbin is provided in the outer circumferential surface thereof with line grooves spaced apart from each other, and
each of the wires is disposed in a corresponding one of the line grooves.

4. The lens moving apparatus according to claim 3 , wherein the line grooves extend to an upper surface or a lower surface of the bobbin.

5. The lens moving apparatus according to claim 3 , wherein a depth of each of the line grooves is greater than or equal to a thickness of a corresponding one of the wires.

6. The lens moving apparatus according to claim 1 , comprising a printed circuit board connected to at least one of the upper and lower elastic members.

7. The lens moving apparatus according to claim 6 , wherein
each of the upper and lower elastic members comprises an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion for connecting the inner frame and the outer frame to each other, and
the wires are connected to the inner frame of at least one of the upper and lower elastic members.

8. The lens moving apparatus according to claim 1 , wherein the sidewall of the receiving recess has an opening configured to communicate with one of a lower surface and an upper surface of the bobbin.

9. A lens moving apparatus comprising:
a bobbin;
a position sensor disposed on an outer circumferential surface of the bobbin, the position sensor being configured to move together with the bobbin;
a plurality of wires disposed on the outer circumferential surface of the bobbin so as to be connected to the position sensor;
a first coil disposed on the outer circumferential surface of the bobbin, on which the position sensor is disposed;
a first magnet disposed so as to be opposite the first coil;
a housing configured to support the first magnet;
upper and lower elastic members coupled to the bobbin and the housing; and
a printed circuit board connected to at least one of the upper and lower elastic members,
wherein at least one of the upper and lower elastic members is divided into two or more parts,
wherein the wires connect at least one of the upper and lower elastic members to the position sensor,
wherein the upper elastic member comprises first to fourth upper elastic members, which are electrically separated from each other,
wherein the lower elastic member comprises first and second lower elastic members, which are electrically separated from each other,
wherein each of the first to fourth upper elastic members and the first and second lower elastic members comprises an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion for connecting the inner frame and the outer frame to each other, and
wherein each of the wires is connected to the inner frame of a corresponding one of the first and second upper elastic members and the first and second lower elastic members.

10. A lens moving apparatus comprising:
a bobbin having a first coil installed at an outer circumferential surface thereof;
a position sensor provided at the bobbin;
a first magnet provided so as to be opposite the first coil and the position sensor;
a housing configured to support the first magnet; and
a conductive pattern formed on the bobbin by plating, the conductive pattern being connected to the position sensor,
wherein the bobbin is provided with a location recess in which the position sensor is located, and
wherein one end of the conductive pattern connected to the position sensor is formed in the location recess.

11. The lens moving apparatus according to claim 10 , wherein the conductive pattern is formed on a surface of the bobbin by laser direct structuring (LDS).

12. The lens moving apparatus according to claim 10 , comprising:
upper and lower elastic members coupled to the bobbin and the housing, wherein
the other end of the conductive pattern is connected to the upper lower elastic member.

13. The lens moving apparatus according to claim 10 , wherein the position sensor is provided at the bobbin so as to be spaced apart from the first coil in a first direction.

14. The lens moving apparatus according to claim 10 , wherein the first magnet and the position sensor are provided at opposite surfaces so as to be spaced apart from each other.

15. The lens moving apparatus according to claim 10 , wherein the first magnet is configured such that an N pole and an S pole are disposed in a second direction and/or a third direction, which is perpendicular to a first direction.

16. The lens moving apparatus according to claim 10 , wherein
the first magnet comprises a plurality of first magnets provided in a first direction, and
each of the first magnets is configured such that an N pole and an S pole are disposed in a second direction and/or a third direction, which is perpendicular to a first direction.

17. The lens moving apparatus according to claim 10 , wherein an adhesive is coated on a surface of the bobbin and an upper surface of the conductive pattern in at least a portion of a region of the bobbin at which the conductive pattern is formed.

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Yoo Hyune O
• Lee Seong Min

Classifications

• G03B3/10 Primary

  Power-operated focusing · CPC title

• H02K33/18

  with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets · CPC title

• G03B5/02

  Lateral adjustment of lens · CPC title

• G03B2205/0015

  by displacing one or more optical elements normal to the optical axis · CPC title

• G02B7/08

  adapted to co-operate with a remote control mechanism · CPC title